Kalanchoe, known as the "lucky flower" in many cultures, is a popular houseplant loved for its vibrant, long-lasting blooms and easy care. While it usually grows in soil, growing kalanchoe hydroponically (in water) is even simpler—no messy soil, less risk of overwatering, and you can watch its roots grow and thrive. This guide will walk you through every step to successfully grow hydroponic kalanchoe, perfect for beginners and plant lovers alike.
What You Need to Start
You don’t need fancy equipment to grow hydroponic kalanchoe. Gather these basic supplies, and you’ll be ready to go:
-
A healthy kalanchoe plant (choose one with strong stems and no signs of rot or pests)
-
A glass jar, vase, or container (clear glass is best—you can see the roots grow!)
-
Room-temperature tap water (let it sit for 24 hours first to remove chlorine)
-
Small stones or pebbles (optional, to stabilize the plant and keep the stem upright)
-
A pair of clean, sharp scissors or pruning shears
Step 1: Prepare Your Kalanchoe Cutting
If you’re starting with an existing soil-grown kalanchoe, you’ll need to take a cutting (or you can wash the roots of a whole plant, but cuttings are easier to adapt to water). Follow these steps:
-
Choose a healthy stem that’s 4–6 inches (10–15 cm) long, with 2–3 sets of leaves. Avoid stems that are flowering (focus on new growth for better root development).
-
Use clean scissors to make a diagonal cut just below a leaf node (the spot where a leaf grows from the stem)—this is where roots will sprout.
-
Remove the bottom 1–2 sets of leaves, so the lower part of the stem is bare (this part will go into the water; leaves in water will rot).
-
Let the cutting sit in a dry, shaded place for 1–2 days. This helps the cut end heal and prevents rot when you put it in water.
Step 2: Set Up the Hydroponic Container
Once your cutting is ready, it’s time to set up its new water home:
-
Clean your glass container thoroughly with soap and water, then rinse well. This prevents bacteria from growing in the water.
-
If using stones or pebbles, add a thin layer to the bottom of the jar—this will help hold the cutting upright without damaging the stem.
-
Pour room-temperature, dechlorinated water into the jar. Fill it enough so that the bare part of the stem is submerged (about 1–2 inches / 2.5–5 cm), but the leaves are not touching the water.
Step 3: Care for Your Hydroponic Kalanchoe
The key to happy hydroponic kalanchoe is simple: clean water, bright light, and the right temperature. Here’s how to keep it thriving:
Water Care
-
Change the water every 3–5 days. Stagnant water causes rot and bacteria growth—fresh water keeps the roots healthy.
-
When changing water, rinse the container gently to remove any slime or debris from the sides.
-
If you notice the water getting cloudy before 3 days, change it immediately.
Light
Kalanchoe loves bright, indirect sunlight. Place your jar near a window that gets 4–6 hours of light per day (east or west-facing windows are best). Avoid direct, harsh sunlight (it can burn the leaves) and dark corners (the plant will become leggy and stop blooming).
Temperature
Keep your kalanchoe in a room with temperatures between 60–75°F (15–24°C). Avoid cold drafts (like near windows in winter) and hot, dry spots (like near heaters)—extreme temperatures will stress the plant.
Fertilizer (Optional)
Hydroponic kalanchoe doesn’t need much fertilizer, but you can feed it once a month with a diluted, water-soluble houseplant fertilizer (use ¼ of the recommended strength). Too much fertilizer will damage the roots, so less is more!
Step 4: Watch for Roots and Blooms
Be patient—roots will start to grow from the leaf node in 2–4 weeks. At first, they’ll be small and white, but they’ll grow longer and thicker over time. Once roots are 1–2 inches (2.5–5 cm) long, your kalanchoe is fully adapted to water!
Kalanchoe blooms in late winter to early spring (usually January–March), producing clusters of colorful flowers in red, pink, yellow, orange, or white. To encourage blooming, make sure it gets plenty of bright light and slightly cooler temperatures (around 55–60°F / 13–15°C) at night for a few weeks in fall.
Common Problems & How to Fix Them
Even with simple care, you might run into a few issues. Here’s how to solve them:
-
Rotting stem/roots: This is usually from leaves touching water, stagnant water, or a cut that didn’t heal. Remove the rotting part with clean scissors, change the water, and make sure no leaves are submerged.
-
Yellow leaves: Too much direct sunlight or over-fertilizing. Move the plant to a shadier spot and stop fertilizing for a month.
-
No roots: The cutting might be too weak, or it’s not getting enough light. Try a new cutting and place it in brighter indirect light.
Final Tips
Hydroponic kalanchoe can live in water indefinitely if you care for it properly. You can also transplant it to soil later if you want a change—just gently place the roots into potting soil and water lightly for the first week to help it adjust.
Remember: kalanchoe is a succulent, so it stores water in its leaves. It’s better to underwater than overwater (but in hydroponics, fresh water is key!).
Growing kalanchoe in water is a fun, easy way to enjoy this lucky, colorful plant. With a little care, you’ll have beautiful blooms and healthy roots to admire all year round!
